Liquid-fuel burner.



B. R. PHILLIPS.

LIQUID FUEL BURNER.

APPLIOATION FILED 922115, 1909.

Patented' sept. 13, 1910.

aktoznu o noveland improved structural details tobe.

'UNITED STATES Param onirica.

BRADFORD n PHILLIPS, or Canam', TEXAS.

LIQUID-FUEL BURNER;

I Specication of Letters Patent. Appiication meajseptembei'is, 1909'. sei-iai No. 517,926.-

Patented sept.- 13, 1910.

Liquid-Fuel Burner,'of -which the following is a specification'.

This lnvention relates to liquid fuel burn-V ers of that type which spray or in'ect atomized oil into the combustion cham er of the furnace. v

The invention resides more particularly in the structure of the burner nozzle, its object being to provide a nozzle in which ainore thorough mixture of the oil and atom- 'izing Huid is effected, -and also to provide improved means for controlling the size of the Hame, so that combustion may take place at any desired distance from the tip of the burner nozzle. A

The invention also has for its object to provide a burner nozzle embodying certain heeinzlfter described andrclaimed.F

n t e accompanym' Ag awing: i' re 1 is the central longitudinal sectional vilw of the burner. Fi s. 2 and 3 are transverse sections onthe lines 2-2 and l3 3, respec 4 tively, of 1.

In the drawing, 5 denotes a tubular casing which forms the main body of the burner nozzle. The casing is open at both ends, one end being Hared a's indicated at 6, this' end being the discharge end of the casing. To the other end of the casing is connected a head 7 havinga tubularportion 8 which screws into the bore 9 of the casing. The

bore 10 of the tubular portion 8 has a side opening -11 -through which the atomizing fluid enters, a nipple 12 being provided for connection of the supply pipe of said Huid.

Through the. bore 10 extends a ltube 13 which is spaced from the wall of said bore, and also extends throu h the bore 9 of the casing 5, in spaced re ation with its wall. The tube 13 terminates in a Hared discharge end 13 extending for a short distance into the Hared dischar e end- 6 of the casing 5.

The tube is forme preferably integral with the head 7, and o ns through one side thereof, a nipple 14 ing providedfor connection of the oil supply pipe;

Into the head 7 is screwed a-valve stem 15A which extends lengthwise throu h the tube 13, and carries a valve 16 locate within the Hared discharge end of the casing 5. The

valve stem is provided with a hand wheel 17 for `o 'eratingl the same, aud the head 7 is provi ed .wit a stuffing box 18 anda gland nut 19. In' the Hared discharge end of the tube 13 is a spider 20 for supporting the valve stem 15. otherwise connected to the valve 16. That end of -thecasing 5 into which the tubular "portion 8 of the head 7 extends is sli htly enlarged, so that the bore of said tu ular portion may have the same diameter as the bore of the casing, and the airtherefore Hows in a straight line through the nozzle. The outer surface of thisend of the casing, is made angular to permit the application of a wrench.

The valve 16 is a hollow tapered body into the smaller end of which'the valve stein 15 screws, the larger end of'the body being .outwardly presented, and this end is .coni vex, and'has an opening 21 leading to the. As already' interior of the valve body. stated, the valve is located in the flared ortion 6 of the casing 5, and it is spaced rom the inner surface 22 thereof. The valve is made hollow to reduce its weight.

. The atoinizing Huid, which may be coinpressed air. or steam, Hows through the bores 10 and 9', and through the space 23 between -the valve 16 and the surface 22. The oil Hows throu h the tube' 13 and is discharged from the ared end 13/ 'thereof into the space 23 in which itmeets the air Howing therethrough, and is mixed therewith, and then discharged from the nozzle in a fine Spry- The surface 22, and the surface of the -valve body 16 extend at different angles,

the former atan angle of approximately 15 degrees and the latter at an angle of approximately 2.0 degrees to the orizontal. Bythis arrangement, the space 23 is tapered in the direction of the discharge end of the nozzle.` The surface 22 terminates ina narrow portion 24 which extends parallel to the longitudinal axis of the nozzle, whereby the vannular space 25 between said surface and the valve body, is abruptly coniiracted.

The' valve body is beveled at its inner end as indicated at 26, and the discharge end of the tube 13 is beveled at the same angle, as indicated at 27, these bevels extending at an angle of approximately degrees to the horizontal. The space 28 between these two beveled 'surfaces extends forwardly.

Said. stem screws into or is obliquely to the space 23. The How of oil may be shut ofi' by turning the hand wheel of heat, with a minimum expenditure of i 17 so as to engage the beveled surface 26 With'the beveled surface 27, the latter thus forming a valve seat. The outer surface of the flared end 13 extends at the same angle as the outer surface of the valve body.

By the herein described construction of the discharge end of the-nozzle, the oil is deflected obliquely across the space 23,

'which results' in a more intimate mixture of' the oil with the air passing. through said space, and the atomized fuel isdischarged from the -nozzle through the contracted space 25 in the form of a fine spray. The length and circumference'of the fiame, as Well as the distance from the tip of the nozzle at which combustion .takes place, may be Varied by adjusting the valve.A This is es'- pecially desirable in cement kilns, retorts and steam boiler furnaces. The valve and the discharge end ofthenozzle are shown as circular in cross section, but the parts may be made in any other cross-sectional' shape according to the shape of the flame desired. As the atomized fuel is discharged in an annular streamfthere isa tendency toward Athe formation of a vacuum wlthin the space inclosed by the-'stream for a short distance from the discharge end of the nozzle Were it not for the convex end of the valve 16.

This end extends into the space in whichthe vacuum would form if the end of the valve at this point is were fiat, an a vacuum therefore prevented.

The burnerproduces a maximum amount 4 fuel, and it therefore efi'ectually serves the purpose for which it is designed.

. valve located in the' What is claimed is -which extends parallel "to said axes, and into which portion the end`of the valve extends.

2. In a liquid fuel burner, a tubular casing havinga fiared discharge end, and en' larged at its other end, a head having a tubular portion `enteringthe enlarged end of the casing, therebeinganiinlet to the bore of the said tubular portion, vsaid bore having the saine diametens-the internal diameter of the intermediate its ends, a" tube in 'said` bo jA opening through one side of the head, an extendi through t-he bore of the casing .into :them ischarge end thereof, and discba'i" gftliereinto, and a the casing. .t ,L 1,:

In testimony 'that v fclaam the foregoing as my own, I havejlirctoiailixed my signa.- ture in the presence ftwdlyvitnesses.

BRADEQRD R. PHILLIPS. Witnesses;V 'I

E. O. y EUGEnCoUrIQg aicd 'l discharge end of' v4o I 1.- In a liquid fuel burner, a tube having 

